Arab Tower · Distribution Transformers

Dry-Type Distribution Transformers

Dry-type (cast resin) distribution transformers from 100 to 2500 kVA, 11kV to IEC 60076-11 — fire-safe, low-maintenance indoor distribution, supplied and commissioned by Arab Tower across the UAE and internationally.

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Rating Range

100–2500 kVA

Primary

11 kV

Standard

IEC 60076-11

Technical Specification

Key Features & Capabilities

No Fire Risk — Self-extinguishing resin, no oil, safe indoor installation
No Oil Maintenance — No testing, no changes, no spill containment
Indoor Installation — Basements, rooftops, electrical rooms — no civil works
Low Maintenance — Cast resin windings, minimal upkeep required
Environmentally Safe — Zero spillage risk, suitable for sensitive sites
Compact Footprint — Smaller than equivalent oil immersed transformers
Humid Environments — Coastal, marine and island with GRP enclosure
Immediate Load — No warm-up period, instant full load acceptance
Temperature Monitoring PT100 sensors
Winding Temp Relay Alarm & trip contacts
Anti-Condensation Heater Moisture protection
Forced Air Cooling AF upgrade (+40% rating)
IP44 Enclosure Dust & splash proof
Outdoor GRP Substation Complete weatherproof

Standard Ratings — 11kV / 433V, 3-Phase, 50Hz

kVA	HV (A)	LV (A)	NLL (W)	FLL (W)	Z (%)	Wt (kg)
100	5.2	133	320	1,800	4.0	580
160	8.4	213	460	2,600	4.0	780
200	10.5	267	540	3,100	4.0	920
250	13.1	333	620	3,700	4.0	1,080
315	16.5	420	720	4,400	4.0	1,280
400	21.0	533	840	5,300	4.0	1,520
500	26.2	667	980	6,300	4.0	1,800
630	33.0	840	1,150	7,600	4.0	2,150
800	41.9	1,067	1,350	9,200	5.0	2,600
1000	52.5	1,333	1,600	11,000	5.0	3,100
1250	65.6	1,667	1,850	13,200	5.0	3,700
1600	83.7	2,133	2,200	16,000	5.0	4,500
2000	104.9	2,667	2,600	19,500	6.0	5,400
2500	131.2	3,333	3,100	23,500	6.0	6,500

Electrical Specifications

Primary Voltage	11,000V (±2 × 2.5% taps)
Secondary Voltage	433/250V
Vector Group	Dyn11
Frequency	50Hz
Insulation Class	F (155°C) std / H (180°C) opt
Temperature Rise	100K (F) / 125K (H)
Impedance	4–6% (per kVA rating)
Cooling	AN standard / AF optional
Protection	IP00 / IP23 / IP44 (optional)

Construction Specifications

Core	CRGO Silicon Steel
Windings	Cast Resin Encapsulated (VPI)
Winding Material	Copper Throughout
Resin System	Epoxy Cast Resin — Class F/H
Finish	RAL 7035 Light Grey
Mounting	Floor Mounted on Base Frame
Standard	IEC 60076-11
Flame Retardant	Self-Extinguishing (IEC 60695)

Typical Applications

Application	Typical Rating	Recommended Configuration
Commercial Office Buildings	500 – 1600 kVA	Indoor enclosed IP23/IP44
Hotels & Resorts	500 – 2500 kVA	Indoor or outdoor GRP enclosure
Hospitals & Healthcare	500 – 2000 kVA	Indoor enclosed, anti-condensation heater
Data Centres & IT Facilities	1000 – 2500 kVA	Indoor enclosed, forced air cooling
Industrial & Manufacturing	500 – 2500 kVA	Indoor open or IP44 enclosed
Island & Marine Resorts	500 – 2000 kVA	Outdoor GRP, marine/tropical duty treatment
Airports & Transport	1000 – 2500 kVA	Indoor enclosed, temperature monitoring
Educational Institutions	200 – 1000 kVA	Indoor open or enclosed

Cooling Configurations

AN — Air Natural	Natural convection cooling. Standard for most indoor applications.
AF — Air Forced	Forced air cooling with fans. Increases rating by up to 40%.

Standards & Compliance

CEIEC 60076-11ISO 9001IEC 60076-1BS 7821CE MarkedISO 9001:2015IEC 60695 (Flame)